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The ultrastructure of the cells of Leydig in the white-crowned sparrow (Zonotrichia leucophrys gambelii) in relation to plasma levels of luteinizing hormone and testosterone

Animal PhysiologyBiologyWhite-crowned SparrowAnimal ReproductionDevelopmental BiologyPlasma LevelsMammalian PhysiologyAnatomyReproductive BiologyPublic HealthEndocrinologyMedicineReproductive PhysiologyReproductive HormoneReproductive Endocrinology